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A-100 percussion problem

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  • A-100 percussion problem

    I have a problem where switching the percussion to ‘Normal' kills a lot of bass in the tone. Switching back to ‘Soft' and it's fine. When ‘Normal' is selected I can toggle between Percussion On and Off and hear a lot of bass being cut out when it's On.
    Has anyone else experienced a problem like this??

  • #2
    With percussion "normal" selected, and percussion switched on, the volume of the upper manual drawbars drops significantly in order for the percussion tones to cut thru better. Is this maybe what you're hearing? If so, it's not a problem ... it's normal operation of the instrument
    Current organs: AV, M-3, A-100
    Current Leslies: 22H, 122, 770

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    • #3
      The drop seems to be mainly a drop in lower frequencies. And it's quite a significant drop. This definitely seems different from other instruments I've played. Also, I have an M3 organ and there's no difference in volume with the percussion on or off.

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      • #4
        Some do this: http://www.dairiki.org/HammondWiki/E...sionVolumeDrop

        You can try the jumper test, and if there is still a problem in your opinion, call a tech. (There may be someone already following this thread who can coach you if you do not have a tech nearby).

        If you are not familiar with electronics, you might get someone else, trained in electronics, to do any of this. Nobody likes to smell Hammond things burning or hear the sound pfft! And if anything gets fried, it might be your fingers first, which is not a pretty sight against the white keys...

        I personally have not tried myself to make any changes on my B3 other than to install the Profkon passive distortion unit.

        However, my A100 is located at a cabin with no techs in the area. I fixed the non-working percussion. It took a bit to get down into the percussion unit. Lots of disassembly, and that's when it's good not to have little kids go by and walk off with screws or nuts or even a hungry dog eying the project. A tech would have done this in minutes. I took hours.
        Last edited by Tonewheel; 01-16-2019, 02:15 AM.
        1955 B3, Leslie 21H and 147. Hammond A100 with weird Leslie 205. 1976 Rhodes. Wurlitzer 200A. Yamaha DX7/TX7. Korg M1. Yamaha C3 grand, 67 Tele blond neck, Les Paul Standard, PRS 24, Gibson classical electric, Breedlove acoustic electric, Strat, P Bass, Rogers drum kit, Roland TD 12 digital drums, Apollo quad, older blackfaced Fender Twin, other amps, mics and bits and pieces cluttering up the "studio."

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        • #5
          That seems to be it!
          Thanks

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